1648934873 has 18 divisors (see below), whose sum is σ = 1770333306. Its totient is φ = 1535524864.

The previous prime is 1648934869. The next prime is 1648934909. The reversal of 1648934873 is 3784398461.

It can be written as a sum of positive squares in 9 ways, for example, as 67043344 + 1581891529 = 8188^2 + 39773^2 .

It is not a de Polignac number, because 1648934873 - 2² = 1648934869 is a prime.

It is a super-2 number, since 2×1648934873² = 5437972430791052258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648934863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6415961 + ... + 6416217.

Almost surely, 2^1648934873 is an apocalyptic number.

It is an amenable number.

1648934873 is a deficient number, since it is larger than the sum of its proper divisors (121398433).

1648934873 is an equidigital number, since it uses as much as digits as its factorization.

1648934873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 423 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 53.

The square root of 1648934873 is about 40607.0790995856. The cubic root of 1648934873 is about 1181.4114282412.

The spelling of 1648934873 in words is "one billion, six hundred forty-eight million, nine hundred thirty-four thousand, eight hundred seventy-three".